diff --git a/notebook_nueva/screen_pillars.py b/notebook_nueva/screen_pillars.py
new file mode 100644
index 0000000..bd519ff
--- /dev/null
+++ b/notebook_nueva/screen_pillars.py
@@ -0,0 +1,73 @@
+from utils import extrude_shape, punch_hole2
+import cadquery as cq
+
+elements = None
+bottom_holes = None  # Not really vents FIXME
+
+
+def init(positions, thickness):
+    """Because these need to match in multiple models, we create the
+    elemments dynamically"""
+    global elements, bottom_holes
+    elements = [
+        {
+            "x": 0,
+            "y": 0,
+            "shape": cq.Sketch()
+            .push(positions)
+            .trapezoid(12, 12, 90, mode="a")
+            .circle(1.8, mode="s"),
+            "height": thickness,
+        }
+    ]
+
+    bottom_holes = [
+        {
+            "x": 0,
+            "y": 0,
+            "shape": cq.Sketch().push(positions).circle(3, mode="a"),
+            "depth": thickness - 13,  # (screw thread length - threaded insert depth)
+        }
+    ]
+
+
+def add(
+    *,
+    model,
+    width,
+    height,
+    thickness,
+    offset_x,
+    offset_y,
+    bottom_face,
+    back_face,
+    shell_t
+):
+    if bottom_face:
+
+        # Mounting pillars
+        for element in elements:
+            model = extrude_shape(
+                model=model,
+                face=bottom_face,
+                w=width,
+                h=height,
+                x_offset=offset_x + element["x"],
+                y_offset=shell_t + offset_y + element["y"],
+                shape=element["shape"],
+                height=-(element["height"] + shell_t),
+            )
+        # Screw holes
+        for hole in bottom_holes:
+            model = punch_hole2(
+                model=model,
+                face=bottom_face,
+                w=width,
+                h=height,
+                x_offset=offset_x + hole["x"],
+                y_offset=shell_t + offset_y + hole["y"],
+                hole=hole,
+                depth=hole["depth"],
+            )
+
+    return model